This I believe is to use a hashset/hashmap. How do I solve this problem?

A playlist is considered a repeating playlist if any of the songs contain a reference to a previous song in the playlist. Otherwise, the playlist will end with the last song which points to null. Implement a function is Repeating Playlist that, efficiently with respect to time used, returns true if a playlist is repeating or false if it is not. For example, the following code prints "true" as both songs point to each other. Song first = new Song("Hello"); Song second = new Song ("Eye of the tiger"); first.setNextSong (second); second.setNextSong(first); System.out.println(first.is Repeating Playlist()); Java SE 13 123456789012345698 10 1 public class Song { 97 11 12 13- private String name; private Song nextSong; public Song(String name) { } this.name name; public void setNext Song (Song nextSong) { this.nextSong = nextSong; } 14 15 } 16 17 18 public boolean is Repeating Playlist () { Copy to IDE Show starting code > throw new UnsupportedOperationException("Waiting to be implemented."); public static void main(String[] args) { Song first = new Song("Hello");